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2 years ago

Find the unit rate pls.

Mathematics

1 answer:

FrozenT [24]2 years ago

4 0

Divide 78 cents by 13 inches to get the cost per inch:

0.78 / 13 = 0.06 ( 6 cents per inch)

Now multiply the cost per inch by 22 inches:

22 x 0.06 = 1.32

It will cost $1.32

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The area of a rectangle is x2-13x+36 cm2. if its width is x-4 cm, what is length

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Step-by-step explanation:

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2 years ago

A real estate company is interested in the ages of home buyers. They examined the ages of thousands of home buyers and found tha

egoroff_w [7]

Answer:

Between 21 years and 75 years

Step-by-step explanation:

Given that a real estate company is interested in the ages of home buyers. They examined the ages of thousands of home buyers and found that the mean age was 48 years old, with a standard deviation of 9 years.

X the ages of home buyers is N(48, 9)

a) $30\leq x\leq 66\\|x-48|\leq 18\\|x-48|\leq 2\sigma$

Hence using Cheby chev inequality

$P(|x-48|\leq 2\sigma)\geq 1-\frac{1}{2^2} \\=0.75$

b) $25.5\leq x\leq 70.5\\|x-48|\leq 22.5\\|x-48|\leq 1.5\sigma$

$P(|x-48|\leq 1.5\sigma)\geq 1-\frac{1}{1.5^2} \\=0.556$

c) Using normal distribution we have

$P(|x-48|\leq 2\sigma)=0.95$

d) z value is 2.97

Hence x lies between

$(48-9*2.97, 49+9*2.97)\\=(21.27,74.73)$

Between 21 years and 75 years

4 0

2 years ago

8.508 8.58 7.5 7.058 what is the decreasing order

Ostrovityanka [42]

First 8.58
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3 years ago

(3, -2) belongs to the solution set of the system of inequalities given below:

Gennadij [26K]

Answer:

true

Step-by-step explanation:

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2 years ago

Is 2x and 5x^2 like terms?

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No, they are not like terms because they cannot be added together. 5x^2 is squared, whereas 2x is not. Though they both have x variables attached to them, they are not like terms because one is squared and the other is not. Examples of like terms include 5 and 8, 4y and 7y, 8z^2 and 10z^2.

Hope this helps!! :)

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2 years ago